Jezebel has wing tattoos like this, but on both sides. They give her video-game-esque maneuverability, letting her change direction in midair and such, as well as slowing her falls and, to an extent, enabling her to glide. She can't actually fly, though.
For wing tattoos(specifically on the upper back) drive me NUTS if the placement is not SOME WHAT anatomically correct.... Kinda silly I know, but they look kinda goofy if they're not... I'm too picky, I guess! lol :P (This guy's is pretty good, from what I can see. ;))